.crawling-step:not(:last-child):after{content:"";position:absolute;left:0;top:0;bottom:50px;z-index:0;transform:translateX(calc(48px / 2));width:3px;border-left:3px solid #eeeeee}@media screen and (max-width:1280px){.crawling-step:not(:last-child):after{left:-5px}}